There are many forests and lakes scattered all over Berlin, but the biggest green area in the city is the Grunewald Forest. It is surrounded by the River Havel in the west and the large Wannsee lake in the south, and makes up one of Berlin's most beautiful beaches. Between jogging, cycling, swimming, bird watching and breathing the freshest air in the city, the range of possible activities in Grunewald is very wide and takes you to a world of peace, relaxation and fascination with nature.